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吴   磊

 

（福州市江南智慧城市建设运营有限公司 ，福州 350000)

摘   要 ：为明确混凝土材料损伤演变过程 ，揭示损伤内在机制 ，研究粉煤灰混凝土筏板基础损伤特性。粉煤灰按比例取代水泥 ，制备出粉煤灰混凝土 ，并测试粉煤灰用量对裂缝损伤特性的影响 ，分析不同环境下损伤度以及强度损伤变化。结果表明：增加粉煤灰掺量可延长首条裂缝出现时间 ，裂缝宽度与面积随掺量增加呈下降趋势 ，当粉煤灰掺量达到 150 kg/cm3   时 ，其裂缝损伤抑制效果最佳 ，且强度保持较好。因此证明 ，合理控制粉煤灰掺量可有效改善粉煤灰混凝土筏板基础的抗裂性能与耐久性 ，为实际工程应用提供重要参考。

关键词：高层建筑 ；筏板基础 ；粉煤灰 ；混凝土 ；损伤特性

中图分类号：TU528           

文献标志码：A            

文章编号： 1005- 8249   (2025)  05- 0024- 04

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .05 .005

 

WU Lei

(Fuzhou Jiangnan Smart City Construction and Operation Co . ,  Ltd . ,  Fuzhou 350000 ,  China)

Abstract :  To clarify the  damage  evolution  process  of  concrete  materials  and reveal the  inherent mechanism of  damage , the damage characteristics  of fly  ash  concrete  raft  foundation  were  studied .  Fly  ash  was used to replace  cement in proportion to prepare fly ash concrete ,  and the  influence of fly ash content on crack damage  characteristics was tested . The  damage  degree and strength damage changes under different environments were analyzed . The  results  showed that an increase in fly ash content could prolong the time for the first crack to appear ,  and the crack width and area decreased with increasing content. When the fly ash content reached 150 kg ,  the crack damage suppression effect was optimal ,  and the strength remained good . Therefore , it is proven that reasonably controlling the fly ash content can effectively improve the crack resistance and durability of fly ash concrete raft foundation ,  providing an important reference for practical engineering applications .

Key words :  high - rise buildings;  raft foundation;  fly ash;  concrete;  damage  characteristics

作者简介： 吴    磊  (1975—) ,   男 ，本科 ，高级工程师 ，主要研究方向： 工程技术与建设管理。

收稿日期：2025 - 05 - 19